106 New Species of Sierola, With Explanatory Notes. 
Head and thorax with a microscopically fine reticulate surface sculp- 
ture; fairly coarsely and closely punctate; hairy clothing short and delicate. 
Head longer than wide, widest across the eyes, narrowing behind and in 
front, width between the eves a little more than the length from eye to 
vertex; flatly convex above, depressed in front, a little tumid beneath, the 
greatest depth beneath the posterior end of the eye; vertical margin slightly 
convex, temples rounded, eyes convex; antennze reaching the mesoscutum, 
all the segments longer than wide, antennal fosse deep; clypeus carinate, 
apically depressed and projecting slightly in front of the anterior margin of 
the head, sloping at the sides, the carina extending backward a little on the 
top of the head; mandibles slender, curved, flattened outwardly, the apical 
margins truncate and toothed, base touching the eye above; gula and sides 
of the head flat, the former medially foreshortened, no longer than wide, 
closely and finely punctate, the groove nearly effaced, anterior margin arcu- 
ately concave, posterior margin incised; abdomen ovate, smooth and _pol- 
ished; wings subinfuscate: length 2.5 mms. 
Described from one female (type) collected on the Pauoa side of Tan- 
talus mountain, Oahu, by J. C. Bridwell, July 15, 1016. 
Type: Cat. No. 67, Bishop Museum. 
68. Sierola minuta n.sp. 
@ small, shining black, legs and antennz yellowish brown to fuscous. 
Head and thorax with a microscopically fine reticulate surface sculp- 
ture; finely and somewhat remotely punctate; hairy clothing short and 
inconspicuous. Head a little longer than wide, width between the eyes more 
than the length from eye to vertex; convex above, depressed in front, a lit- 
tle tumid beneath; vertical margin straight, temples rounded, eyes flatly 
convex; antenne a little longer than the head, the pedicel longer than wide, 
following segments as wide as long, antennal fossee deep; clypeus carinate, 
apically depressed and projecting slightly in front of the anterior margin of 
the head, sloping at the sides, the carina extending backward on the top of 
head beyond the base of the antennz; mandibles slender, curved, truncate 
and toothed apically, base touching the eye above; gula and sides of the 
head convex, the former medially foreshortened, wider than long, anterior 
margin arcuately concave, posterior margin incised; abdomen short ovate, 
smooth and polished; wings subinfuscate; length 2 mms. 
Described from one female (type) collected in Middle Puna, Hawaii, 
at 750 ft. elevation, by W. M. Giffard, August 6, 1918. 
Type: Cat. No. 68, Bishop Museum. 
69. Sterola hirsuta n.sp. 
2 shining black, legs, antenne basally and mandibles light yellowish 
brown. 1-4 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, a little coarser on the head: coarsely, shallowly and 
closely punctate; thickly clothed with long silvery hairs. Head longer than 
wide by a half, width between the eyes more than the length from eye to 
vertex; convex above, depressed in front, a little tumid beneath; vertical 
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